Welt tempering mechanism



July 5, 1932. F. ASHWORTH 1,866,003

WELT TEMPERING MECHANISM I Filed May 25, 1929 4 Sheets-sheaf. 1

July 5, 1932.

F. ASHWORTH 1,866, 003

WELT TEMPERING MECHANISM Filed May 23, 1929 4 Sheets-Sheet 2 July 5, 1932. V F. ASHWORTH WELT TEMPERING MECHANISM Filed May 23, 1929 4 Sheets-Sheet 3 July 5, 1932. ASHWOARTH WELT TEMPERING MECHANISM Filed May 25, 1929 Sheets-Sheet 4 fi H FRED ABHWORTH, OI BEVERLY, HASSLOHUSE'I'IB, ABSIGKOB TO NEW JERSEY, A OOBPOBATION '5 tion of Harry Ly to a body of moistenilng end to welt wetting. and tempe Patented July 1932 UNITED STATES PATENT orrlcs EB! CORPORATION, OF PATEBBOH,

UNITED BHOE 0! new JERSEY wmr'rnnrmmo mam! Appllcatlon an an as, me. mm in. man.

The present invention has relation in. genand in particular to the type of device forming the subject-matter of co-pending applicaon No. 221,056 file September 21 1927 for welt tempering machine, in which device the welt in its passage to the stitch forming mechanism of a welt shoe sewing machine is caused to pass into and through or tempering liquid in such manner that o y the portion of the welt at and adjacent the bevel and the groove shall be wetted.

The desirability of tempering the welt before attaching it to the upper of the welt shoe is well known in for tempering purposes to the surfaces of the inner or grooved margin of the welt are likewise well recognized.

The object of the invention is to improve the device forming the subject-matter of the aforesaid Lyon application in respects of achieving greater convenience and efiiciency and simplicity in its operation and adjustment.

To this end the invention consistsin the features of construction, arrangements and combinations of parts shown in the drawings, and hereinafter described and claimed, the advantages of which will be understood by those skilled in the art ironi the following description.

In the drawings illustrating the invention in its preferred form, Fig. 1 is a front eleva= tion, partly broken away, of a welt shoe sewing machine having the devices of the invention applied thereto; .Fig. 2 is a view of certain portions of Fig. 1 in elevation on a larger scale; Figs. 3 and t are sectional views in vertical planes respectively at'right angles to each other, of the welt-guiding roll and pull- 0d shown in Fig. 2; Fig. 5 is a rear view of the welt tempering or wetting device alone,

certain portions being broken away to show the valve mechanism of the barometric feed; Fig. 6 is a vertical section on line 6-8 of Fig. 2; Fig. 7 is aplan' view of the parts shown in Fig. 5. the barometric feed bottle having been removed; and Fig. 8 is a view in vertical devices well-known stitch formin the art, andthe ad-' vantages of confining the wetting of the welt with the devices section on line 8-8 ofFig. 7, with a of the receiver for the barometric fee bottle 7 broken away.

The drawings show a typical welt sewing machine such as is shown and described in U. S. Letters Patent No. 1,07 6,87 8, issued on October 28, 1913 to Andrew Eppler for sewing machine, to which patent reference may be had for a specific description of all parts not referred to and described hereinafter. This machine is equipped with the usual and instrumentalities common to machines of t is type, receiving actuation through the usual means from a main shaft 1, the rotation of which is controlled by the operator through the usual controlling means in the shape of the usual treadle 2 located close to the floor upon which the machine stands, and rotating about the axis of a jack shaft 3 to which it is aflixed. This shaft is supported in suitable bearings 4 in connection with the pedestal 5 of the machine and is combined by means of a link 8 (not shown) :Eor transmitting driving power to rotate the main shaft 1. The welt wetting or tempering devices of the present invention include a receptacle 7 tor the moistening or tempering medium, usuall water, which is contrived to be attache to the table 8 provided in connection with the pedestal 5 which supports the sewing head of the machine. In accordance with one feature of the invention the receptacle 7 is of improved design enabling it to be ,uickly and easily applied to or removed rem the sewing mac inc and quickly and accurately brought into the level relation desirable for advantageous performance of ortion the" welt wetting function. The receptacle 7 tapped to receive at its opposite side the clamping screw '13 equipped with lock nut;

the receptacle 7 14 and adapted to engage the top edge of the rim 12. The depending flange 10 is cut away in the vicinity of the lower end of this clamping screw so that the clamping screw 13 may rest upon the rim 12 and by its extension or retraction tip the receptacle 7 about a horizontal axis passing through the point of engagement of the rim 12 with the notch 11. p 1

To provide for tipping the receptacle 7 about an axis at right angles to that just described, to complete the levelling, a clamping screw 15 having a lock nut 18 is inserted in a hole bored and tapped for its reception substantially midway of the length of the bracket 9 and at a point enabling its extremity to engage the table 8 inwardly of its rim '12. From the bottom of thereceptacle 7 depends an angular bracket 16 of a length to underlie the table 8 when the device is in position and equipped at its extremity with a clamping screw 17, having a lock nut 19,,

to engage the under surface of table 8 inwardly ofits rim. Thus, by the opposed relation of clamping screw 17 to the three points of contact on the upper surface of the table and its rim, the device is firmly clamped in operative position upon the table, and by manipulation of clamping screws 15' and 1 'thereceptacle 7 and associated parts may be swung about a horizontal axis coinciding with the top line of the rim 12 of the table, such axis being substantially at right angles to the one described hereinbefore, and cooperating therewith to permit a complete and accurate adjustment of the level of the receptacle 7 with respect to the wetting or tempering liquid.

In accordance with another feature of the invention, means are provided to prevent the welt from soaking up an excess of liquid while the sewing is suspended. Thus, in the wall of the receptacle 7 there is formed a socket 20 within which is fixed by a clamping screw 21 a vertical stud 22 having a carrier in the form of a bushing 23 slidably mounted thereon and provided with a pin 24 which is engaged by the forked end 25 of a lever 26 pivoted on a transverse pintle 27 mounted in ears 28 extending up from the rim of the receptacle 7. This lever 26 is connected by a link 30 to an arm 31 on the jack shaft 3 on which the treadle is mounted. Thus, when the treadle 2 is depressed by the operator to start the stitching operation, the lever 26 is depressed and the carrier 23 slides downward on its stud 22 until it brings up against the opposing surface of that portion of the receptacle 7 in which the socket 20 is formed. WVhen the operator removes the pressure of his foot upon the treadle, the latter is raised by the usual spring 32, operating the stop mechanism of the sewing machine through the link 6 in customary manner, and through. the jack shaft 3, and lever 26 sliding the carrier-23 upward on its stud 22. This carrier as is shown in Fi 5 and 6, carries a bracket 33 which exten s across the receptacle 7 to-support the welt guiding means which direct the welt cornerwise into the water or other liquid 34 employed to effect the tempering. This bracket 33 is formed with a sleeve 35. which fits slidably over the exterior of the carrier 23. The upper end of carrier 23 is threaded on its exterior and provided with a thumb nut 36. The sleeve 35 has fixed in its outer I surface a pin 37 to which is attached a contractingspiral spring 38 having its upper end attached to a similar pin 39 which extends through a vertical slot 40 in the sleeve 35 and is screwed into the side of the carrier 23. The contraction of this spring tends to move the sleeve 35 upwardly with respect to the carrier 23, such upward movement being limited by the engagement of the-upper end of the sleeve 35 with the opposed surface of the thumb nut 36, applied to the u per end of carrier 23. The opposite end 0 the bracket 33 is forked to embrace a stud 41 fixed in the bracket 9 on the side of the receptacle 7, such stud serving to steady the bracket 33 and prevent any tendency to swing on the stud 22. r

The welt guiding means is suspended within the receptacle 7 by means of a lug 42 which is connected with the bracket 33 by means of ment of the welt guiding aperture to receive various widths and thicknesses of welt. The

member 46 is slidably mounted on a headed stud 48 which is fitted into a socket in the member 45 and secured therein by means of a screw 49 countersunk into the member 45 and threaded into the internally threaded extremity of the headed stud 48. A thumb screw 50 is threaded into the member 46 to bear against the headed stud 48 and maintain the spaced relationship established between the members 45 and 46 to adjust such spacing to fit closely the width of the welt 62 which is being tempered. A guide pin 51 is provided in connection with the member 45, which is received within a slot formed in the upper end 52 of the member 46 and serves to prevent rotation of the member 46 two other members by being mounted slidably upon a similar headed stud 53 which is secured in a socket in the member 45 by means of ascrew 54 which is engaged with its internally threaded extremity. A thumb screw 1,eee,ooa

55 is threaded into themember 47 to bear against the headed stud 53 and thus to main-' tain the member 47 in adjusted relation with respect to the other two members 45 and 46. This adjustment provides for the roper spacing necessary to accommodate-we t of a given thickness, such spacing being established between the portion 56 of the member 47 and the opposing portions 57, 58 of the respective members 46 and 45. At 59 is in dicated a ortion of the member 46 of increased width to permit the formation of a slot in member 46 which receives the reduced end ortion 60 of the member 47. At 61 the member 47 is provided at each of its vertical surfaces with a rib to increase the width of its bearing a ainst the bevelled edge of the welt 62. he lug 42 is rabbeted intothe material of the bracket 33 along the arcuate slot 44 formed in the latter, so that adjustment of the lug along the slot determines the angle of the transverse axis of'the welt with respect to the level of the liquid 34 within the receptacle 7. This adjustment permits the welt to be so presented to the liquid that only the grain side thereof shall be brought in contact with the liquid, the arrangement and operation bein similar to that set forth and described in t e aforesaid co-pending application of Lyon.

The bracket 33, as explained here inbefore, is supported by means of its sieeve 35, being upheld by the spring 38 with its sleeve pressed against the underside of thumb nut 36. The level of the liquid within the receptacle 7 is determined'with substantial accuracy by means ,to be described hereinafter. Thus, the welt, after being threaded through the aperture defined by the three members 45, 46, and 47, and comprising the guide is disposed in the desired an ular relationship to the surface of theliqui Then, with the treadle depressed and the carrier 23 resting solidly upon the opposing surface in which the socket 20 is formed, the thumb nut 36 is manipulated to raise or lower the bracket 33 and the welt guiding device depending therefrom to immerse the welt in the liquid .to the desired de th. After this relationship has been esta lished, a clamping screw 65 threaded through lugs 66 formed on the split skirt of the thumb nut 36 is tightened to maintain the adjustment. I

From the foregoing description it will be apparent that when the treadle 2 is depressed to start the stitching operation the link 30 and lever 26 bring down the carrier 23 into its lowered position, in which relation the welt is properly immersed in the liquid 34 to the extent determinediby the previous adjustments, and as the stitching progresses and the welt is fed along it is tempered by the liquid absorbed durlng its contact with the contents of receptacle 7. The inherent spring in the connections between the treadle and the welt-guiding means has been found adequate to provide for the slightly. reater depression of the treadleto attain, ull speed. Then when the treadle is allowed to rise, in order to stop the machine, the welt is removed ent1rely from contact with the tempering hquidso that itwill not soak up an excess of liquid to.

work injury subsequently when the machine is restarted and such portion arrives in contact with the u per.

The means or supplying the liquid tempering medium, usuall water, to keep the receptacle 7 filled to the same level at all times com rises the bottle or container 67 which is p aced mouth down within the receiver 68 therefor which is formed with a passa e 69 delivering the liquid into receptacle The bottle and its, receiver 68 comprise a feed device of the usual barometric level ty e, acting to maintain the liquid within t e receptacle 7 at a predetermined constant level. The bottle mouth is equipped with a valve 70 of customary type relied on to pull the welt through the tempering device. When heavy welting has been in process of being sewed, the friction of the welt in the guides of the welt wetting device and its resistance to bending has placed an excessive burden upon the feed mechanism. To relieve this extra load and prevent reduction or irregularity in the length of the stitches, a feature of the invention contemplates the provision of means independent of the work-feeding devices to assist in ropelling the welt through the tempering evices. This independent feeding may be accomplished in any suitable or preferred manner, and in the present embodiment is efiected by employing in connection with the. devices described hereinbefore a device substantially the same in construction as the pull-0fl described in U. S. Letters Patent No. 1,189,437 granted on July 4, 1916 to-Andrew Eppler for welt sewing machine. with the usual welt guiding roll which is mounted on the head'of the machine slightly above the level of the. stitch forming instrumentalities and comprises a roll 74 anda yoke 75 which are fixed on the lower end of an arm 77 depending from a hub 78 which is mounted for swinging movement upon the bushing 79 which carries the welt clamping member 80 employed to actuate the alligator jaws and knife ofthe weltcutting mechanism which partsthe welt after the stitching on It is combined known. This hub 78 is combined by means of a link 81 with a depending portion 82 of the feed slide lever 83 which is actuated from the main shaftby means of itscam to traverse the carrier '84 and effect the feeding of the work. This link 81 is pivotally secured at one of its ends in a slot formed in the portion 82 and at its opposite 'end combined by v a bolt 85 with a yoke 86, the shank 87 of which is secured rotatably within a bearing formed for it in a depending portion 88 integral with the hub 78. While the feed slide lever is returning to its starting point V after effecting the feed, the link 81 is moved toward the right, rotating the hub 78 about the axis of the bushing 79 and carrying the arm 77 outwardly and upwardly. The welt 62 after emerging from the receptacle 7' passes under a roll 89 pivotally supported on the pintle 27 in connection with the receptacle and thence is led substantially vertically upwardly through a guide eye in the end of a member 91 attached to the end of the yoke bolt by a screw 92 and thence between the roll 74 and its yoke 75 which are carried at the, lower end of the swinging, arm 77. Thereafter the welt is passed over the welt guiding roll to the stitch forming ins'trumenwhen the feed of the work occurs, the pulloff isfswung downwardly and to the left, delivering to the stitch forming instrumentalities the slack previously pulled aside by the pull-off in its upward and outward movement, so that the feeding of the work and consequent drawing of the welt 'over the welt guiding roll takes place with no substantial resistance offered by the welt in being pulled along with the work.

What is claimed as the invention is 1. A welt shoe sewing machine having, in combination, stitch-forming devices, actuating means therefor, welt wetting devices including a receptacle for moistening liquid and a movable guide for the welt, and means operating upon starting and stopping the ma chine to move the guide respectively to and from a position in which the welt isimmersed.

2A welt shoe sewing machine having, in combination, stitch-forming devices, actuating means therefor including a treadle for starting and stoppingthe machine, and weltwetting devices comprising a receptacle for 'moistening liquid, a guide directing the welt into the liquid, a movable support for said guide, and means operably combining the support with the treadle to cause the wettin of the welt when the treadle is positioned to start the machine and to suspend the wetting action when the treadle is in stopping position. I

3. A welt shoe sewing machine having, in combination, stitch-forming devices, actuating means therefor including a treadle, weltwetting devices'including a receptacle for moistening liquid and a movable guide,-and means operably combined with the treadle for moving the guide to immerse a predetermined portion of the surface of the welt and to remove the welt from contact with the liquid.

4. A welt shoe sewing machine having, in combination, stitch-forming devices, a receptacle for moistening liquid, and means for securing the receptacle to the machine frame with capacity for leveling adjustment comprising a pair of clamping screws in combination with the receptacle to engage opposite surfaces of the frame, and a shoulder and a clamping screw also in combination with the receptacle and engaging the same side of the frame.

5. A welt shoe sewing machine having, in combination, stitch-forming devices, weltwetting devices including a receptacle for moistening li uid, and means for securing the receptacle to t e machine frame with capacity for leveling adjustment comprising three engaging members to engage one surface of the machine frame,'and a fourth member to engage the opposite surface of the machine frame, three of said members being adjustable in their extent with respect to the fourth thereof;

6. A welt shoe sewing machine having, in combination, stitch-forming devices, actuating means thereforincluding a treadle for starting and stopping the machine, welt-wetting means comprisin a receptacle for moistening liquid, a gulde leading the welt into the liquid, a movable support for the guide including a sleeve, 21- vertical stud combined with the receptacle, a bushing slidable upon the stud and within the sleeve, means connecting the-bushing and the sleeve, and connections between the treadle and bushing for imparting to thebushing a predetermined amount of movement alon the stud to immerse the welt'in the liquid and to remove it therefrom.

7. A welt shoe sewing machine having, in combination, stitch-forming devices, actuata- 12f ing means therefor including a treadle for starting and stopping the machine, welt-wetting means comprising a receptacle for moistening liquid, a guide leading the welt into the liquid, a movable-support for the guide including a sleeve, a vertical stud combined with the receptacle, a bushing slidable upon the stud and within the sleeve, means connecting the bushing and the sleeve, connections between the treadle and bushing for moistening liquid, and guiding imparting to the'bushing a predetermined amount of movement along the stud to im- 'merse the welt in the liquid, and to remove moistening liquid, a guide leading the welt into the llquid, a support for the guide includin a sleeve, a vertical stud combined with t e receptacle, a bushing slidable upon the stud through connection with the treadle, and having the sleeve slidablymount'ed on its exterior, means connecting the bushing and the sleeve, and means for adjustably positioning the sleeve along the length of the bushing to determine the depth of the im-v mersion of the welt.

9. A welt shoe sewing maching having, in combination, stitch-forminng devices, welt wetting devices including a receptacle for moistenin liquid and also guiding means for directing 51c passage of the welt through the liquid so as to moisten less than the whole surface of the welt, means for relatively moving the welt guide and the surface of the moistening liquid to remove the welt from the moistening liquid, and a pull-ofi dis osed between the welt-wetting devices an the machine to move the guide respectively to and from a position in which a predeterminedportionof the surface of the welt is immersed.

13. A welt shoe sewing machine having, in F combination, stitch forming devices, actuating means therefor, welt-wetting means comprising a receptacle for moistening liquid, a guide leading the welt into the liquid, a movable support for the guide including a sleeve, a vertical stud combined with the receptable, a bushing slidable upon the stud and within the sleeve, means connecting the bushing and the sleeve, and means operating upon starting and stopping the machine to move the bus ing respectively to and from a position in which a predetermined portion of the surface of the welt is immersed.

In testimony whereof I have signed my name to this specification.

FRED ASHWORTH.

stitch-forming devices to pull the welt through the guiding means.

10. A. welt shoe sewing machine having, in combination, stitch-forming devices, weltwetting devices including a receptacle for means for directing the welt through the liquid so as to moisten less thanthe whole surface of the welt, means for relatively moving the welt guide and the surface of the moistening liquid to remove the welt'from the mositening liquid, and means for propelling the welt through the said guiding means.

11. A welt shoe sewing machine having, in combination, stitch-forming devices, actuating means therefor including a treadle, and welt-wetting devices including a receptacle for moistening liquid, a guide for the welt, carrier means for the guide operably combined with the treadle to cause the guide to immerse the welt, and means for adjusting the guide relative to the carrier to vary the extent of the welt surface brought in contact with the liquid.

12. A welt shoe sewing machine having, in combination, stitch forming devices, actuating means therefor, welt-wetting devices including a receptacle for moistening liquid and a movable guide for the welt, and means operating upon starting and stopping the 

